But others have outright rejected the idea of a McCain nomination and presidency, warning that his tirades suggest a temperament unfit for the Oval Office.
"The thought of his being president sends a cold chill down my spine," Sen. Thad Cochran (R-Miss.), also a senior member of the Appropriations panel, told the Boston Globe recently. "He is erratic. He is hotheaded. He loses his temper and he worries me."
A former colleague says McCain's abrasive nature would, at minimum, make his relations with Republicans on Capitol Hill uneasy if he were to become president. McCain could find himself the victim of Republicans who will not go the extra mile for him on legislative issues because of past grievances.
"John was very rough in the sandbox," said former senator Rick Santorum (R-Pa.), who is outspoken in his opposition to McCain's candidacy. "Everybody has a McCain story. If you work in the Senate for a while, you have a McCain story. . . . He hasn't built up a lot of goodwill."
In the end, the right will support him because they have nowhere else to go. And the media will go out of their collective way to support him.